Battery Safety Valve Detection via Electrolyte Bridging
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Solution Overview
Problem
Current battery management modules do not effectively monitor battery safety valves, which can lead to safety issues such as explosions due to the inability to detect the opening of safety valves, as there is no physical quantity to monitor, and only limited information is available through sound and air pressure signals.
Innovation Solution
A battery safety valve detection device is placed on the outer side of the safety valve, featuring a substrate with a first and second detection strip made of conductor material, arranged in a detection area where they can be exposed and connected by an electrolyte spray, allowing for the detection of changes in potential difference or current when the safety valve opens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery management modules are used to monitor battery status, then voltage, temperature, and current can be measured, but the safety valve opening state cannot be detected
Solution Approach 1:
The patent introduces an electrolyte as an intermediary substance that bridges the safety valve and the detection strips. When the safety valve opens, electrolyte is sprayed onto the detection strips, creating an electrical connection that signals the valve opening state. This intermediary approach solves the problem of detecting safety valve status without directly monitoring the valve itself.
Solution Approach 2:
The patent replaces the traditional mechanical/acoustic detection methods (sound signals, pressure sensors) with an electrical detection system. By using conductive electrolyte to create electrical connections between detection strips, the system substitutes mechanical monitoring with electrical signal detection, enabling more reliable and direct safety valve status monitoring.
2Object-affected harmful factors
If safety valve opens to release pressure, then explosion is prevented, but chemical substances leak and may catch fire
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the electrical connection state between detection strips. When electrolyte bridges the strips (indicating safety valve opening), the system receives immediate feedback and can trigger alarm signals or protective measures. This feedback loop enables timely response to both the beneficial pressure release and the harmful chemical leakage.
3Loss of time
If battery management module monitors voltage and temperature, then basic battery status is known, but timely intervention for safety valve issues is not possible
Solution Approach 1:
The patent prepares the detection system in advance by pre-positioning the detection strips and ensuring they are ready to detect electrolyte immediately upon safety valve opening. The electrolyte-conductive path is pre-established between the strips, so that the moment the valve opens and sprays electrolyte, detection occurs instantly without requiring complex real-time analysis or calibration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device accurately and quickly determines if the safety valve has opened by measuring resistance changes between the detection strips, enabling timely intervention and preventing potential battery explosions.
Implementation Method 1
the first detection strip and the second detection strip in the detection area are at least partially exposed on a surface of the substrate, and when the safety valve is opened, an electrolyte pollutes the detection area, so that the potential difference and/or a current between the first detection strip and the second detection strip changes
Data Source
AI summary
A battery safety valve detection device includes a substrate fixedly provided on an outer side of a safety valve, and a first and a second detection strips provided on the substrate. The substrate is made of an insulating material, the first and second detection strips each are made of a conductor material, and there is a potential difference between the first and second detection strips; and a detection area is defined on a side of the substrate close to the safety valve, the first and second detection strips extend in the detection area, the first and second detection strips in the detection area are at least partially exposed on a surface of the substrate, and when the safety valve is opened, an electrolyte pollutes the detection area, so that the potential difference and/or a current between the first detection strip and the second detection strip changes.